<template>
  <div>
    <!--  面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>角色管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--    卡片视图-->
    <el-card>
      <!--      添加角色按钮区域-->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!--      角色列表数据-->
      <el-table :data="rolesList" border stripe>
        <!--        展开列-->
        <el-table-column type="expand">
          <template v-slot="scope">
            <el-row :class="['bdbottom',i1===0 ? 'bdtop':'','vcenter']" v-for="(item1 ,i1) in scope.row.children"
                    :key="item1.id">
              <!--              渲染一级权限-->
              <el-col :span="5">
                <el-tag closable
                        @close="removeRightById(scope.row,item1.id)">{{item1.authName}}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--              渲染二级和三级权限-->
              <el-col :span="19">
                <el-row :class="[i2===0 ? '':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <!--                  二级权限-->
                  <el-col :span="6">
                    <el-tag type="success"
                            closable
                            @close="removeRightById(scope.row,item2.id)">{{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>

                  </el-col>
                  <!--                  三级权限-->
                  <el-col :span="18">
                    <el-tag type="warning"
                            v-for="(item3,i3) in item2.children"
                            :key="item3.id"
                            closable
                            @close="removeRightById(scope.row,item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!--        索引列-->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template v-slot="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--    分配权限的对话框-->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed">
      <!--      树形控件-->
      <el-tree :data="this.rightsList" :props="treeProps"
               show-checkbox node-key="id" default-expand-all
               :default-checked-keys="defKeys"
               ref="treeRef"
      ></el-tree>
      <span slot="footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    data () {
      return {
        //  角色列表
        rolesList: [],
        // 控制分配权限对话框
        setRightDialogVisible: false,
        //  所有前线列表数据
        rightsList: [],
        //树形控件的属性绑定对象
        treeProps: {
          label: 'authName',
          children: 'children'
        },
        //默认选中节点id值的数组
        defKeys: [],
        //当前即将分配权限角色的id
        roleId: ''
      }
    },
    created () {
      //获取所有角色
      this.getRolesList()
    },
    methods: {
      //获取角色列表
      async getRolesList () {
        const { data: res } = await this.$http.get('roles')
        console.log(res)
        if (res.meta.status !== 200) return this.$message.error('获取角色列表失败！')
        this.rolesList = res.data
      },
      //根据id移除tag标签
      async removeRightById (role, rightId) {
        //弹框提示是否删除，使用MessageBox弹框
        const confirmResult = await this.$confirm('此操作将永久删除', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: ''
        }).catch(err => err)
        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除！')
        }
        //发起删除的请求
        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) {
          this.$message.error('删除权限失败！')
        }
        //为当前角色赋值新的返回数据的权限
        role.children = res.data
        this.$message.success('删除权限成功！')
      },
      //展示分配权限的对话框
      async showSetRightDialog (role) {
        //将角色保存到data中de roleId
        this.roleId = role.id
        //获取所有权限数据
        const { data: res } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) return this.$message.error('获取权限数据失败')
        this.rightsList = res.data
        this.getLeafKeys(role, this.defKeys)
        //打开对话框
        this.setRightDialogVisible = true

      },
      //通过递归的形式，获取角色下所有的三级权限id，
      // 并保存到数组defKeys中，node :判断是否为三级节点
      getLeafKeys (node, arr) {
        //如果当前node 节点不包括children，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }
        node.children.forEach(item => this.getLeafKeys(item, arr))
      },
      //监听分配权限对话框的关闭事件
      setRightDialogClosed () {
        this.defKeys = []
      },
      //点击为角色分配权限
      async allotRights () {
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr = keys.join(',')
        const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
        if (res.meta.status !== 200) return this.$message.error('分配权限失败！')
        this.$message.success('分配权限成功！')
        this.getRolesList()
        this.setRightDialogVisible = false
      }
    }
  }
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }
</style>
